In Houston, a city where the sex trade is booming, an organization was ruled by one madam, Hortencia Medelles-Arguella; Hortencia was the mastermind of the biggest sex ring to be busted in Texas.

Marvin Mercado, aka ``Shy Boy,'' and his brother, Pierre aka ``Boo Boo'' were major players in the violent street gang, the Asian Boyz in the 1990's.

Ross William Ulbricht, the man behind Silk Road, an online marketplace for illegal drugs.